Fastener secured installation and fastener member therefor



May 19, 1 936.

C. L. HALL FASTENER SECUREDINSTALLATI ON AND FASTENER MEMBER THEREFOR Filed March 15, 1933' Invenfiar: 2/ Chajes L.Hall

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Patented May 19, 1936 UNITED STATES PATENT OFFICE FASTENER- SECURED INSTALLATION AND FASTENER LIEMIBER THEREFOR Charles L. Hall, Detroit, Mich., assignor to United-Carr Fastener Corporation, Cambridge, Mass., a corporation of Massachusetts My invention aims to provide improvements in fastener secured installations and fastener members therefor.

In the drawing which illustrates preferred embodiments of my invention:-

Flgure 1 is a plan view of a ,portion of an installation embodying my invention; a

Fig. 2 is an enlarged section taken on the line 2-2 of Figure 1, the fastener member being shown in elevation;

Fig. 3 is an end view of a modified form of fastener member;

Fig. 4 is a section of a structure showing the parts illustrated by Fig. 2 but with the-addition of a bushing and the modified form of fastener shown in Fig. 3; and,

Fig. 5 is an enlarged complete section of the parts shown in Figure 4.

In the particular embodiment of my invention m selected for illustration 'by the drawing, the snap fastener or hinge pin is formed from a single piece of sheet metal and has a concavo-convex base I divided by radial slits 2 extending from the edge toward the center to permit yielding of ,5 the base. The hinge pin fastener illustrated also has a tubular shank pressed from the metal of the base and shaped to provide a neck portion 3, a head 4 and a shoulder 5. The shank is divided longitudinally by slits 6 to permit yielding action '3 thereof.

In the particular installation selected for illustration of my invention (Figs. 1 and 2) I have provided two relatively thin sheet metal parts I and 8 each of which is provided with an aper- U ture 9-9 in alignment with each other. The plate-like members 1 and 8 are adapted to be rotated relative to each other and are provided with camm ing surfaces It and il. When the plates are rotated the surfaces I0 and II cause 40 the plates 1 and 8 to move away from each other.

During this operation the shoulder 5 of the fastener member holds tight and the base tends to flatten thereby maintaining a tension on the two plate members.

Referring now to the particular embodiment of my inventlonillustrated by Figs. 3, 4 and 5, I

have shown, in combination with the fastener member and the plate members, abus'hing having a flange l2 bearing against one face of the'plate" member 1 and a tubular portion l3 passing through the apertures 0-4 in both of the plates, agbestillustrated in Figs. 4 and 5. Inthe installation illustrated by 1188. 4 and 5 the neck '3 portion 3 of the stud member passes through the tubular portion ll of the bushing and the angled projections l4, pressed from the sides of the head 4, have their free ends terminating in engagement with the flange I! of the bushing, as bestillustrated in Fig. 5. Thus when the plate 5 members I and I are rotated relative to each other the projections ll hold the bushing against clusively'useful to secure together and constitute the hinge pin for elements such as a pair of scissors blades. In this connection, when it is desired to remove the fastener, say, .0 facilitate sharpening of the blades or to enable replacement of the worn element (in Figs. 4 and 5, the bushing 5 9-42) this may be effected by squeezing the head portions 5 together to flex the shank portions, and by concurrently inwardly flexing the angled projections M in the embodiment of Figs. 4 and 5, so that the fastener can be withdrawn. Pressing inwardly on the base I to project the head portlons 4 outwardly, serves to render the head more accessible, which is of particular utility in the embodiment of Figs. 4 and 5 in which it facilitates I compression of the projections H to a position enabling removal.

While I have illustrated and described preferred embodiments of my invention, I do not wish to be limited thereby, because thescope of my in- 40 vention is best defined by the following claims.

I claim:

1. A snap fastener for securing a pair of juxtaposed apertured members having the apertures in alignment, comprising a bushing having a flange bearing against one member and a .tubular shank extending into the apertures, a snap, fastener member having a yieldable shank eiitending through the tubular shank, a yieldable base on one end of said shank contacting with one of said members, and a shouldered head on the other end of said shank having in addition to said, head a plurality of angled projections having free edges spaced laterally from saidhead and engaging with the flange of said bushing to hold said mem bers together, and said yieldable base permitting relative movement of said apertured members toward and away from each other.

2. A snap fastener member formed from a single piece of metal and having a base dished in cross-section and divided by cuts extending inwardly from the periphery thereof to permit flattening of said base, a tubular shank extending from said base and having an enlarged head adjacent to the free end thereof and said head being divided by cuts other than those provided aosasae ior flexing of the base thereby to permit contraction and expansion of said head.

3. A snap fastener member formed from a I single piece of metal and having a materially yieldable base dished in cross-section, a shank extending from said base and having a head adjacent to the free end thereof and said head having in addition thereto a plurality ,of projections having free edges spaced laterally'from said head and facing toward said base.

. CHARLES L. HALL. 

